Hey Chris, if you look at the main thread for that tutorial (first post I mean) and look for a link that says "PS7-OMP..zip" That holds the .PSD file and the Style file. In the videos if I recall correctly he uses the normal Photoshop brushes (if they aren't in the default try loading in some of the ones already there in photoshops brush folder until you find what your looking for) Besides that just use the .PSD file as a base and just look through the videos and try your hand at it. The textures he uses in the picture you linked to, are found somewhere here on the forums, I believe he adapted Pasis's tutorial and how he uses the forests... I don't have time to look for links , but if you need them let me know or if anyone else knows of them off hand post em up! Anyways good luck!